Siccobaccatus estevesii subsp. insigniflorus (Diers & Esteves) P.J.Braun & Esteves in Succulenta (Netherlands) 69: 7. 19
Siccobaccatus estevesii subsp. insigniflorus in Succulenta (Netherlands) 69: 7. 1990
is new combination for Austrocephalocereus estevesii subsp. insigniflorus in Kakteen And. Sukk. 39: 268. 1988